Automatic gas-valve.



"no. 691,784. Patented Jan. 28, I902.

C. KOSHALKU.

AUTOMATIC GAS VALVE.

(Application filed. June 17, 1901.)

(No Model.)

WITNESSES INVENTOR.

UNITED STATES PATENT OFFICE.

CHARLES KOSHALKO, OF J OHNSTOWN PENNSYLVANIA.

AUTOMATIC GAS-VALVE.

SPECIFICATION forming part of Letters Patent No. 691 ,784, dated January28, 1902.

Application filed June 1'7 1901. Serial No. 64,896. (No model.)

To all whom it may concern:

Be it known that I, OHARL'EsKosHALKo, a citizen of the United States,residing at Johnstown, in the county of Oambria and State ofPennsylvania, have invented certain new and useful Improvements inAutomatic Gas-Valves; and I do hereby declare the following to be afull, clear, and exact description of the invention, such as will enableothers skilled in the art to which it appertains to make and use thesame.

My invention has relation to automatic gasvalves, and has for its objectthe provision of means whereby the gas will be positively andautomatically shut off from the burner if for any reason it should beaccidentally extinguished, as by being blown out or by failure of thesupply from the main or in any other manner; and my invention consistsin the novel construction, combination, and arrangement of partshereinafter described and claimed.

Referring to the accompanying drawings, Figure l is a side elevation;Fig. 2, a vertical sectional View; Fig. 3, a top view looking down onthe burner from above; and Fig. 4, a detail of the key by means of whichthe gas is turned on and off in the ordinary manner, all these viewsbeing shown on an enlarged scale, so that the parts may be plainly seenand their construction understood.

A designates a gas-burner screwed onto the end of a gas-pipe B. Withinthe burner A is a horizontal partition 0, which is formed with avalve-seat on which seats a valve D, the

stem of which is connected with a rock-shaft E, the said rock-shaftbeing journaled in the walls of the burner. The valve D isnormallyclosed by a spring F, coiled around the valve-stem between thevalve and a bridge F, which extends across the burner-tube and by whichthe stem is guided. The rock-shaft E projects through the wall of theburner and has fixed on its outer end the lever G. A bent tube H isattached to the burner at one side, and said tube, which is ofsubstantially U shape, has a bulb g on one of its legs, while the otherleg is open at its upper end and con-.

tains a piston H, which is attached to one end of the lever G.

I designates a rod that hangs from the other end of the lever G and hasat its lower end a hook 2', which engages in a spiral slot k in. aturn-key K, which may be either the ordinary cock of the gas-fixture orsimply a turn-key fixed to the burner for the purpose of operating thebook 11. Above and to one side of the spiral slot a lug L is formed onthe key, the purpose of which is to catch the hook when it has beenswung to one side by traveling in the slot.

The tube H is intended to contain mercury or other material which isreadily expanded by heat, and the tube is so placed with relation to theflame of the burner that when the gas is burning the heat of the flamewill keep the mercury or other material in the tube in an expandedcondition and the piston H elevated, in which position the valve D willbe held oft its seat and the gas allowed to flow freely through theburner.

Operation: Then it is desired to light the gas, the key K is turned inthe direction of the arrow, and the hook c, engaging with the spiralslot, will be directed to one side and will when it reaches the end ofthe slot eugage with the lug L, and the further turning of the key willdraw the rod I down and open the valve D. The gas may now be lighted,and the heat from the flame will act on the expansive material in thetube H and bring such material up against the lower end of the piston Hand holdsuch piston up, and thus keep the valve D open so long as thegas is ignited. It by accident the flame is extinguished, material intube H will contract and allow the piston H to descend and the valve Dto close, thus at once and effectually closing off the flow of gas. Thehook 1 drops to one side of the lug L when the pressure of the hand isreleased from the key K, and hence this book offers, no resistance tothe movement of the rock-shaft when it is being turned by the descent ofpiston H.

Having described my invention, I claim- 1. In an automatic gas-valve,the combination of a burner, a valve within the same and normallyclosedby a spring, a piston connected to said valve and adapted to openthe same against the pressure of said spring,,a tube in which saidpiston works, an expansive material in said tube and means whereby saidvalve is opened and held open until the expansion of the materialin thetube will operate the piston and maintain said valve open so long as thegas is ignited, substantiallyas described.

2. In an automatic gas-valve, the combination with the burner, a valvetherein, and a spring bearing on said valve to normally close the same,of a rock-shaft journaled in the burner and connected with the valve, alever on said rock-shaft, a tube containing an expansive material, apiston in said tube attached to said lever and actuated by the expansivematerial, a rod depending from said lever and having a hook at its lowerend, a turn-key having a spiral groove in its side and a lug at the endof said groove to engage the said hook.

3. In an automatic gas-valve, the combination with a valve arrangedwithin the burner and means for manually opening said Valve, of meansfor causing the valve to close comprising a piston, connections betweenthe piston and the said valve, a vesselin which said piston Works,arranged within the heating sphere of the flame, an expansive andcontractive material in said vessel controlling the movement of thepiston, and a spring to cause the piston to follow the contractions ofsaid material substantially as described.

In testimony whereof I have affixed my signature in presence of twowitnesses.

CHAS. KOSHALKO. Vitnesses:

JOHN PARKEs, PAUL McGLosKY.

